A Study of Encapsulated Cell Technology (ECT) Implant for Patients With Late Stage Retinitis Pigmentosa
Public ClinicalTrials.gov record NCT00447993. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase II/III Study of Encapsulated Human NTC-201 Cell Implants Releasing Ciliary Neurotrophic Factor (CNTF) for Participants With Retinitis Pigmentosa Using Visual Acuity as the Primary Outcome
Study identification
- NCT ID
- NCT00447993
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Neurotech Pharmaceuticals
- Industry
- Enrollment
- 67 participants
Conditions and interventions
Conditions
Interventions
- Low Dose NT-501 Combination Product
- High Dose NT-501 Combination Product
Combination Product
Eligibility (public fields only)
- Age range
- 18 Years to 68 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 7, 2007
- Primary completion
- May 25, 2009
- Completion
- May 25, 2009
- Last update posted
- Aug 12, 2024
2007 – 2009
United States locations
- U.S. sites
- 11
- U.S. states
- 8
- U.S. cities
- 11
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Retina-Vitreous Associates Medical Group | Beverly Hills | California | 90211 | — |
| University of Califoria, Davis | Sacramento | California | 95817 | — |
| University of California, San Francisco | San Francisco | California | 94143-0730 | — |
| Retina Group of Florida | Hollywood | Florida | 33021-6746 | — |
| University of Florida | Jacksonville | Florida | 32216-1480 | — |
| Kellogg Eye Center | Ann Arbor | Michigan | 48105 | — |
| University of Minnesota | Minneapolis | Minnesota | 55455-0501 | — |
| NY University Medical Center | New York | New York | 10016 | — |
| Casey Eye Institue | Portland | Oregon | 97239-4197 | — |
| The Hamilton Eye Institute | Memphis | Tennessee | 38163 | — |
| Retina Foundation of Southwest | Dallas | Texas | 75231 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00447993, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Aug 12, 2024 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00447993 live on ClinicalTrials.gov.